[1]}, [2]} propose distinct
parameterizations for \(c\) -convex functions living on the sphere
specifically. The latter applies it to training flows on the sphere
using the construction from McCann's theorem. Our work can be seen as
a generalization of the exponential-map approach in
[2]} to arbitrary Riemannian
manifolds. In contrast to this work,
the maps from
our discrete \(c\) -concave layers are universal.
